677687957 has 2 divisors, whose sum is σ = 677687958. Its totient is φ = 677687956.

The previous prime is 677687947. The next prime is 677687963. The reversal of 677687957 is 759786776.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 648517156 + 29170801 = 25466^2 + 5401^2 .

It is a cyclic number.

It is not a de Polignac number, because 677687957 - 2¹⁴ = 677671573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 677687957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (677687947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338843978 + 338843979.

It is an arithmetic number, because the mean of its divisors is an integer number (338843979).

Almost surely, 2^677687957 is an apocalyptic number.

It is an amenable number.

677687957 is a deficient number, since it is larger than the sum of its proper divisors (1).

677687957 is an equidigital number, since it uses as much as digits as its factorization.

677687957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31116960, while the sum is 62.

The square root of 677687957 is about 26032.4404733786. The cubic root of 677687957 is about 878.3681694931.

The spelling of 677687957 in words is "six hundred seventy-seven million, six hundred eighty-seven thousand, nine hundred fifty-seven".